Transition to self-similarity of diffusion of tracer in turbulent patch
Article
Article Title | Transition to self-similarity of diffusion of tracer in turbulent patch |
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ERA Journal ID | 3685 |
Article Category | Article |
Authors | |
Author | Strunin, Dmitry V. |
Journal Title | Journal of Engineering Mechanics |
Journal Citation | 127 (11), pp. 1089-1095 |
Year | 2001 |
Place of Publication | United States |
ISSN | 0733-9399 |
1943-7889 | |
Digital Object Identifier (DOI) | https://doi.org/10.1061/(ASCE)0733-9399(2001)127:11(1089) |
Web Address (URL) | http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000127000011001089000001&idtype=cvips&gifs=yes |
Abstract | [Abstract]: A mixing of a passive tracer inside a turbulent patch generated by a localized short-time perturbation is studied numerically and analytically. Two kinds of an initial distribution of a tracer are considered: two-layer and continuous with constant gradient. For the turbulent patch shaped as a layer, it is shown that, regardless of details of initial distributions of a turbulent energy and dissipation, a tracer concentration evolves to self-similar regimes as time elapses. Analytical self-similar solutions to turbulent diffusion equations are found for three symmetric shapes of a turbulent patch: layer, cylinder, and sphere. Distributions of the concentration inside a patch are found to be substantially nonuniform, with a typical ratio of a concentration gradient in the middle of a patch to its initial value of about 0.5. |
Keywords | self-similarity of diffusion; tracer; turbulent patch |
ANZSRC Field of Research 2020 | 401213. Turbulent flows |
490302. Numerical analysis | |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Department of Mathematics and Computing |
https://research.usq.edu.au/item/9y53w/transition-to-self-similarity-of-diffusion-of-tracer-in-turbulent-patch
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